twoway

Twoway is a term used to describe bidirectional or reciprocal interaction, communication, or exchange. In general usage, it refers to any process, relationship, or system that allows or requires messages, signals, or actions to move in both directions.

In technology and software, the concept of bidirectional flow appears as two-way binding or bidirectional data binding. This refers to interfaces where changes in the data model automatically update the user interface and user input can modify the underlying data, keeping both sides synchronized. The term twoway is sometimes used in branding or product naming to denote this bidirectional capability, though the hyphenated form “two-way” is more common in prose.

In transportation and infrastructure, two-way (often written two-way) describes traffic that flows in both directions on a street or road. A two-way street accommodates vehicles traveling in opposite directions, in contrast to one-way streets that permit traffic in a single direction.

In communications and broadcasting, two-way systems enable interactive exchanges between participants, such as two-way radios, two-way paging, and other bidirectional communication channels. These systems contrast with one-way broadcasts where information flows in only a single direction.

Etymology and usage notes: the standard written form in English is usually two-way, especially in general writing. Twoway often appears as a product name, brand, or in compound nouns where a closed form is preferred.

See also: bidirectional, two-way binding, two-way radio, two-way street.